functionpollDOM(){constel=document.querySelector('my-element');if(el.length){// Do something with el}else{setTimeout(pollDOM,300);// try again in 300 milliseconds}}pollDOM(); 这假设该元素最终会出现。如果你不确定这是否会发生,你需要考虑取消计时器(使用clearTimeout或clearInterval)。 在JS ...
functionsleep(ms){returnnew Promise(resolve=>setTimeout(resolve,ms));} asyncfunctiondelayedGreeting(){ console.log('Hello');await sleep(2000);console.log('World!');await sleep(2000);console.log('Goodbye!');} delayedGreeting(); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. ...
functionpollDOM(){ const el = document.querySelector('my-element');if(el.length) {// Do something with el}else{ setTimeout(pollDOM, 300);// try again in 300 milliseconds} } pollDOM(); 这假设该元素最终会出现。如果你不确定这是否会发生,你需要考虑取消计时器(使用clearTimeout或clearInterva...
A sleep function is like a pause button in programming. It allows your code to wait or take a break for a specified amount of time. In Node.js, there isn’t a native blocking sleep function to achieve a wait-like behaviour. Why Do Programs Need Sleep? Here are a few scenarios where ...
除了Narrative JS,jwacs(Javascript With Advanced Continuation Support) 也致力于通过扩展JavaScript语法来避免编写让人头痛的异步调用的回调函数。用jwacs 实现的sleep,代码是这样: function sleep(msec) { var k = function_continuation; setTimeout(function() { resume k <- mesc; }, msec); ...
client api 是promise异步模型，而且js中不提供sleep，该怎么解决？测试版本1 functionsleep(time:any){...
It's possible to implement sleep() in JavaScript. A naive implementation of sleep() might look like this: function sleep(t) { const start = Date.now(); while (Date.now() - start < t); } This solution has an obvious problem: even if we do want to block a thread for a period...
js 中实现sleep函数 function sleep(msec) { var k = function_continuation; setTimeout(function() { resume k <- mesc; }, msec); suspend; } 这个语法更吓人了,并且还是java里不被推荐使用的线程方法名。坦白说我倾向于 Narrative JS。 同Narrative JS一样,jwacs也须要预编译,预编译器是用 LISP 语言...
$('#foo').slideUp(300).delay(800).fadeIn(400); 二.通过循环消耗cpu function sleep(n) { var start = new Date().getTime(); while(true) if(new Date().getTime()-start > n) break; } 三.用setTimeout 可以采用如下的方法:
下面是javascript实现sleep函数的各种方法：(1)通过循环实现JavaScript sleep(2)通过Java Applet实现JavaScript sleep(3)通过Flash实现JavaScript sleep(4)通过XMLHttp实现JavaScript sleep 通过循环实现JavaScript sleep代码如下：// bad implementationfunction sleep(milliSeconds){ var startTime = new Date()...